Table 2.

HRs for influenza and pneumonia deaths, by meeting physical activity guidelines

Guideline met	Deaths	Person-years	Unadjusted HR (95% CI)	Adjusted HR* (95% CI)	Adjusted HR† (95% CI)
Neither‡	1128	3 133 418	1.00 (ref)	1.00 (ref)	1.00 (ref)
Aerobic only§	239	1 571 944	0.43 (0.36 to 0.50)	0.60 (0.50 to 0.71)	0.64 (0.54 to 0.76)
Strength only¶	71	208 731	1.00 (0.75 to 1.33)	1.12 (0.85 to 1.49)	1.16 (0.88 to 1.54)
Both**	78	1 016 632	0.20 (0.15 to 0.26)	0.46 (0.35 to 0.61)	0.52 (0.39 to 0.68)

Sample adults who participated in the National Health Interview Survey from 1998 to 2018 and were eligible for linkage to the National Death Index through 2019 (n=577 909).

*Adjusted for sex, age, race/ethnicity, education and marital status.

†Adjusted for sex; age; race/ethnicity; education; marital status; smoking status; alcohol consumption; body mass index; presence of heart disease, stroke, hypertension, diabetes, cancer, chronic obstructive pulmonary disease and asthma and influenza and pneumococcal vaccination status.

‡Reported <150 min/week of moderate-intensity equivalent physical activity and <2 episodes/week of muscle-strengthening activity.

§Reported ≥150 min/week of moderate-intensity equivalent physical activity and <2 episodes/week of muscle-strengthening activity.

¶Reported ≥2 episodes/week of muscle-strengthening activity and <150 min/week of moderate-intensity equivalent physical activity.

**Reported ≥150 min/week of moderate-intensity equivalent physical activity and ≥2 episodes/week of muscle-strengthening activity.